Open AccessQ-switched Thulium-doped fibre laser using Bismuth (III) Telluride-based saturable absorber
Author(s) -
Muhammad Farid Mohd Rusdi,
X.S. Cheng,
Anas Abdul Latiff,
Ahmad Haziq Aiman Rosol,
Mushtaq Ahmad,
M. F. A. Rahman,
Mohd Hafiz Jali
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1371/1/012008
Subject(s) - materials science , saturable absorption , bismuth telluride , thulium , q switching , doping , bismuth , laser , fiber laser , optoelectronics , optics , slope efficiency , pulse duration , composite material , wavelength , metallurgy , thermal conductivity , thermoelectric materials , physics
We demonstrate a passive Q-switched thulium-doped fibre laser (TDFL) pulse generation using bismuth (III) telluride (Bi 2 Te 3 ) thin film as saturable absorber. The Bi 2 Te 3 was fabricated by a simple processing technique; simply by embedding the Bi 2 Te 3 into the polyvinyl alcohol (PVA) film. By sandwiching 1 mm x 1 mm Bi 2 Te 3 thin film between two fibre ferrules in a TDFL ring cavity, a stable Q-switching pulses train was generated. The repetition rate and pulse width were tuneable from 10.72 kHz to 39.9 kHz and 13.08 µs to 5.98 µs, respectively, as the pump power increased from 309 mW to 454 mW. The slope efficiency was 4.51%, while, the maximum pulse energy was calculated as 0.17 µJ.